What's new

Do the surround channels really need equal power that's identical to the fronts? (1 Viewer)

Kevin Alexander

Screenwriter
Joined
Apr 17, 1999
Messages
1,364
I was looking to save a little money by picking up a separate 3-channel amp to power my LCR speakers, while using my receiver's internal amps to power the 4 surround speakers. The external amp will be about 100X3 while the 4 surrounds will be 50X4 from the H/K 325. Is this acceptable since the surrounds are basically for effects? Or should I go ahead and spring for a 5 or 7 channel amp that will give me equal power all the way around? Will a volume mismatch occur if I use a 3-channel amp for the front and let the lower rated amplification in the receiver go to the rear? Thanks in advance.
 

RobWil

Supporting Actor
Joined
Mar 17, 2003
Messages
733
I'm sure it's preferrable to have equal power but if you calibrate your speaker levels you're not going to have a volume mismatch. The only problem I guess would be if you really cranked it and the HK's amps couldn't keep up!
 

MannyE

Stunt Coordinator
Joined
Sep 22, 2000
Messages
233
Location
Miami Beach
Real Name
Manny Elgarresta
The short answer is yes.

Calibration should keep volume levels equal so there won't be any mismatch, but you will really be working with the limitations of your surround speakers and amp.

If you really like to crank it, I see a day when you will over-extend the surrounds and may not notice that they are distorting and then boom...you need four new speakers.

How do I know that? Don't ask. :angry:
 

Paul Donovan

Auditioning
Joined
May 7, 2002
Messages
4
My understanding is that the "gain" has to be identical or you may hear some differences. My suggestion would be to buy a 7 channel amp or two identical 4 channel amps like HK which you can get on UBID usually or I assume even cheaper somewhere else. ;)
 

MikeMcGrew

Stunt Coordinator
Joined
Apr 17, 2000
Messages
131
Calibrating might be a little more difficult in this situation as you will be doubling your power supply to the fronts and center. This should produce a 3dB increase in volume here. Also, the amps power will sound cleaner and maybe even a little different. While H/K is excellent about their power ratings, you are still really going to be pushing the surrounds to keep up. If you can afford to go with more channels then I would suggest doing so. IMHO it will be well worth the extra cash. MM
 

Ricky T

Supporting Actor
Joined
Oct 28, 1999
Messages
921
Hard to tell how much he would push the HK without knowing the sensitivity and impedance of his speakers. If they are 99dB sensitiivity, 8 ohm Klipschs, then he'd be hard press to use 1 full watt.
 

Arthur S

Senior HTF Member
Joined
Jul 2, 1999
Messages
2,571
And to add to what Ricky T said, unless you have full range surrounds you should have the crossover to the surrounds cut off below 80 Hz. Deep bass is by far the most demanding of an amp and 50 watts should be ample.

Artie
 

Jerome Grate

Senior HTF Member
Joined
May 23, 1999
Messages
2,989
You may want to look into a SPL meter in determining on whether each speaker is putting out the same dbs at the reference level, which I believe is around 20 to 25 dbs. Having an amp put out 100 watts per channel is different from 50 watts per channel, but I think the db difference is not as profound as you think it is during moderate volume levels.
 

Users who are viewing this thread

Forum Sponsors

Forum statistics

Threads
347,166
Messages
4,804,255
Members
142,015
Latest member
rajbcpa1
Top